393.89 — Buses - Missing or inadequate driveshaft protection
FMCSA violation code under Vehicle Maintenance. 204 events recorded in roadside inspections. Severity weight: N/A.
Violation Description
Buses - Missing or inadequate driveshaft protection
About This Violation Code
Code 393.89 falls under the Vehicle Maintenance BASIC category in FMCSA's Safety Measurement System (SMS).
When this violation is cited during a roadside inspection, it contributes to the carrier's Vehicle Maintenance BASIC score. Carriers with high BASIC percentiles may be prioritized for FMCSA interventions including warning letters, investigations, or compliance reviews.
Regulatory Reference
Federal Motor Carrier Safety Regulations
This violation references 49 CFR 393.89 in the Federal Motor Carrier Safety Regulations.
Top Enforcing States
Where 393.89 is most commonly cited (last 180 days)
Click a state to see roadside inspection activity, top stations, and carrier profiles in that jurisdiction.
Citation Trend (12 months)
Monthly count of 393.89 citations. Red bars mark months with OOS-triggering citations.
Most Active Stations
Inspection stations citing 393.89 most often (last 180 days)
Often Cited Together
Other violations commonly found on the same inspection (last 90 days)
Citation patterns suggest related root causes (e.g., HOS violations paired with logbook errors).
Top Carriers Cited
Ranked by frequency • 151 carriers total • Page 1 of 7
Top Carriers with 393.89 Violations
Showing 25 of 151
| # | Carrier | USDOT | # Violations |
|---|---|---|---|
| #1 | THREE BEAR RENTALS LLC | 525298 | 6 |
| #2 | A&M LIMOUSINE CO INC | 2364399 | 4 |
| #3 | MOUNTAIN RESORT SERVICES | 1843643 | 4 |
| #4 | GO TREK USA LLC | 2254796 | 4 |
| #5 | ABM INDUSTRY GROUPS LLC | 1807582 | 4 |
| #6 | WEDRIVEU INC | 2286995 | 3 |
| #7 | GROOME TRANSPORTATION OF ALABAMA LLC | 1124785 | 3 |
| #8 | SUMMIT TRANSPORTATION LLC | 2989989 | 3 |
| #9 | GOOD TRIP ADVENTURES LLC | 3429788 | 3 |
| #10 | NORTENO EXPRESS LLC | 2929080 | 3 |
| #11 | EASTERN SIERRA TRANSIT AUTHORITY | 1891175 | 3 |
| #12 | PJM EXECUTIVE CAR SERVICE LLC | 2543089 | 3 |
| #13 | TRANSIT SERVICE INC | 324742 | 2 |
| #14 | GOAT CITY TRANSPORT LLC | 2931912 | 2 |
| #15 | RECREATION CONNECTION INC | 2491726 | 2 |
| #16 | MUSASHI INTERNATIONAL INC | 3864230 | 2 |
| #17 | MOUNTAINEER EXPEDITIONS LLC | 2978260 | 2 |
| #18 | ANTELOPE VALLEY AIRPORT EXPRESS INC | 709384 | 2 |
| #19 | NATIONAL PARK SAFARI COMPANY LLC | 3520131 | 2 |
| #20 | MATRAN INC | 2270664 | 2 |
| #21 | BOSTON LIMO AND CARS INC | 3734469 | 2 |
| #22 | UNIVERSAL LIMOUSINE AND TRANSPORTATION CO | 620177 | 2 |
| #23 | CG TOURS INC | 3627896 | 2 |
| #24 | RIO TAXI & LIMOUSINE LLC | 3699066 | 2 |
| #25 | IQ BOSTON TRANSPORT INC | 3939893 | 2 |
Recent Inspections
Latest inspections where 393.89 was cited • 204 total events • Page 1 of 9
Recent Inspections with 393.89
Showing 25 of 204
| Date | Report # | State | Level | OOS |
|---|---|---|---|---|
| Mar 13, 2026 | 87283204 | MA | Level 1 | No |
| Mar 13, 2026 | 87283205 | MA | Level 1 | No |
| Mar 10, 2026 | 87259759 | HI | Level 1 | No |
| Mar 4, 2026 | 87213586 | MA | Level 1 | No |
| Mar 4, 2026 | 87217257 | CA | Level 5 | No |
| Feb 25, 2026 | 87142370 | CA | Level 5 | No |
| Feb 23, 2026 | 87206928 | CA | Level 5 | No |
| Feb 19, 2026 | 87087012 | MA | Level 1 | No |
| Feb 17, 2026 | 87103668 | TX | Level 1 | No |
| Jan 26, 2026 | 86900319 | CA | Level 1 | No |
| Dec 12, 2025 | 86551291 | MA | Level 5 | No |
| Dec 9, 2025 | 86550861 | TN | Level 1 | No |
| Dec 8, 2025 | 86515427 | MA | Level 5 | No |
| Dec 8, 2025 | 86515478 | MA | Level 5 | No |
| Dec 8, 2025 | 86515428 | MA | Level 5 | No |
| Nov 19, 2025 | 86634764 | CA | Level 5 | No |
| Nov 18, 2025 | 86634722 | CA | Level 5 | No |
| Nov 11, 2025 | 86299425 | PA | Level 1 | No |
| Oct 28, 2025 | 86171955 | CA | Level 5 | No |
| Oct 24, 2025 | 86149860 | OH | Level 5 | No |
| Oct 17, 2025 | 86092999 | HI | Level 1 | No |
| Oct 14, 2025 | 86046020 | MA | Level 5 | No |
| Oct 7, 2025 | 85995372 | CA | Level 5 | No |
| Sep 16, 2025 | 85798902 | HI | Level 1 | No |
| Sep 4, 2025 | 85703873 | HI | Level 1 | No |